     {:source-paths ["src" "docs/src/cljs" "docs/src/clj"]
      :compiler {:output-to "dev/public/assets/main.js"
                 :output-dir "dev/public/generated"
-                :preamble ["react/react.js"]
                 :optimizations :none
                 :source-maps true}}
     :heroku
     {:source-paths ["src" "docs/src/cljs" "docs/src/clj"]
      :compiler {:output-to "dev/public/assets/generated/om_bootstrap.js"
                 :output-dir "dev/public/assets/generated"
-                :externs ["react/externs/react.js"
-                          "externs/highlight.js"]
-                :preamble ["react/react.min.js"]
+                :externs ["externs/highlight.js"]
                 :optimizations :advanced
                 :pretty-print false
                 :source-map "dev/public/assets/generated/om_bootstrap.js.map"}}

             :uberjar {:aot :all
                       :omit-source true
                       :main om-bootstrap.server
                       :plugins [[lein-cljsbuild "1.0.3"]]
                       :prep-tasks ^:replace [["clean"]
                                              ["cljsbuild" "clean"]
                                              ["cljsbuild" "once" "heroku"]
                                              ["javac"]
                                              ["compile" ":all"]]

             :docs {:aot :all
                    :omit-source true
                    :main om-bootstrap.server
                    :plugins [[lein-cljsbuild "1.0.4"]]
                    :prep-tasks ^:replace [["clean"]
                                           ["cljsbuild" "once" "heroku"]
                                           ["javac"]
                                           ["compile" ":all"]]
